Device for refacing valve-seats.



H. CASLER.

DEVICE FOR REFACING VALVE SEATS.

APPLICATION FILED OCT. 30, 1911.

1,170,51 1. Patented Feb. 8, 1916,

Z SHEETSSHEET 1- l 2 16 v l Herman 'asler, 5 wue mtoz 35 Gwen m1 8 m; 9 ($2 THE COLUMBIA PLANDGRAPH .CO., WASHINGTON, D. c.

H. CASLER.

DEVICE FOR REFACING VALVE SEATS.

APPLICATION FILED OCT- 30. I911.

Patented Feb. 8, 1916.

2 SHEETS-SHEET 2.

II II Herman O'aler, 5 me unto o THE COLUMBIA PLANOGRAPH CLL, WASHINGTON. D. c.

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Livonia.

Specification of LettersPercent.

THE GENERAL rnivir YORK.

Patented Feb. 8. rain.

Application filed October 30, 1911. Serial No. 657,628.

To all whom it may concern:

Be .it' known that I, HERMAN" CASLER, a citizen of the United States, residing at Canastota, countyof Madison, and State of New York, have invented certain new. and useful Improvements in Devices for Refacing Valve-Seats, of which the following is a full, clear, and exact description.

The invention which forms the. subject of this application'for Letters Patent, is an improvement in devicesfor refacingthe worn surfaces of the valve seats of power pumps and like machinespand designed and adapted to be introduced into the chamber containing the valves and applied. to the valve seats therein, thusavoiding the necessity for their removal for refacing.

The primary objects of theinvention are to provide improved cutter ornfacing mechanism, to secure better and more readily manipulated ELClJtlStlIlg means for such cutter, and to mprove the design and construction of the device, whereby its insertion andremoval will be facilitatedand a more even surfacing of the valve seats secured.

The improved device 1s lllllStIEtllGClln the drawings hereto annexed, and the particular parts or features of the same which constitute the invention will be described by the aid of said drawings, and more particularly specified in the claims following such 'description.

Figure 1 is a longitudinal section. on line w+m of Fig. 2. a Fig. 2 is a horizontal section on line g -g of Fig. 1. Fig. 3 is a bottomview partly in section, and Fig. 4: is a side elevation withparts broken away.

As one of the special objectsof the invention is to provide a device which maybe insertedthrough the hand-holes in the casing of a pumpchamber and; used to reface the valve seats. without removing them. the

operative parts are inclosed in a casing 1, the form of WlllCll, wlthout departure from the invention, may be greatly varied within the scope of the appended claims according to the particular arrangement of gearing employed or the design of the pumpswith which it isto be used. Extending through this casing is a vertical spindle 2, constituting a main or power shaft carrying a worm 3, and having rectangular or similar sockets at its ends for receiving the head of a flexible shaft 4 shown in Fig. 2. There also extends through the casing a vertical to admit the spindle 6, about which mitted from the main cylindrical chamber or bore containing a spindle head 5, the center of which is bored the head 5 is adapted to revolve within its chamber.

By referring to Fig. l the method of applying and using the tool will be understood. In this figure, 7 designates a valve seat the surface of which is to be dressed orrefaced. The regular valve post or stem is unscrewed and the steel post or stem 6 insertedin its place. The device is thenpassed down over the stem 6, and secured. and adjusted bythe means hereinafter set forth, and the other parts are constructed and arranged to impart a comparatively rapid rotation to a cutter head or disk 8, having at its edge cutting point 9, and a relatively slow rotationtothe spindle head 5, whereby thecutting point will be caused to travel over the entire upper face of thevalve seat. With thisexplanation the construction and purpose of the elements about to be described will be readily. understood.

nular gear15 mounted and adaptedto revolve on the spindle head 5. At its lower portion theannular gear 15 is provided with internal gear teeth 16, which engage with an elongated pinion 17 and thereby transmit a movement of rotationto a pinion l8 ke ved to a vertical spindle 19. This spindle. 19st ,itslower end is provided with a threaded socket adapted to receive the stud of the cutter head or disk 8. Thuspower is transthe cutter disk and one of the necessary movements of the latter secured. The gear wheel 10 meshing with the worm 3 carries an eccentricpin 20 on its underside on which is mounted and free to revolve pinions 21 and 21 These pinions 21 and 21 are keyed together and are of different pitches. Pinion 21meshes with loose internal gear .23and pinion 21 meshes with stationary in ternal gear 22. Gear 22 is keyed to the frame or casing of the instrument by means of a pin 85, Fig. 8, while gear 23 is journaled in the lower wall of the casing 1, by means of a depending flange 25, fitting in a groove in said wall. The pinion 21 in reor driving shaft to volving with the gear 10, and acting against i and the lower part 27 is provided with gear teeth 28, which engage with corresponding teeth 29, cut on the outer periphery of the loose gear 23. In this way a rotary movement, much slower than that of the cutter head, is imparted to the spindle head 5and hence to the cutter.

To feed the cutter downward or to adjust it for a cut of the required depth, the following means are employed. When the tool is slipped over the post or stem 6, it rests upon a presser foot 30, from which latter extends upwardly a stud or pin 31 that bears upon a spiral spring 32, in a recess in the spindle head 5. The upper end of the post or stem 6 is provided .with a threaded socket to receive an adjusting screw 33, the flange or head of which rests upon a hollow spacing block or ring 34:.

By turning the screw 33 therefore, the entire device will be raised or lowered on the stem 6, againstthe tension of the-spring 32. In this way the tool is very readily adjusted to its work. a j

i In devices of this general class heretofore, the facing of thevalve seats has sometimes been effected by rose cutters or by a cutting point revolved around the valve spindle as a center while being fed radially. The fac ing of a valve seat by such devices, however, has either required the application of greater power than is practicable under the conditions usually met with, or has been more or less imperfect owing to the great difficulty in completely eliminating vibration and lost motion. By the means hereinabove described these objections are avoided or minimized and a true and polished surfaceobta-ined with great rapidity and with the expenditure of comparatively little power.

The invention is not limited to the details of construction described and shown, nor

to the particular arrangement of the elements employed to effect the operations characteristic of the device except as required by thescope of the claims.

What I therefore claim is:

' 1. In a tool for dressing or refacing valve seats and which is adapted to be placed over a post or stem secured centrally to the stem, as set forth.

valve seat, the combination with a cutter head carrying a cutting point, of means for rotating the head about its own axis and means for simultaneously revolving the head around the axis of the said post or 2. In a tool for dressingor refacing valve seats and which is adapted to be supported on or by a post or stem secured centrally to the valve seat, the combination with a rotary cutter head having a cutting point and mounted eccentrically to the said post or stem, of apower shaft, and gearing for imparting revolutionary movement to the cutter head about its own axis and revolutionary movement of the head about the axis of said post or stem, as set forth.

3. The combination with a stem or post adapted to b'e centrally secured to a valve tool comprising a cutter head having a cutting point, a driving .-shaft,gearing intermediate to the same and the cutter head for imparting a relatively rapid rotation there to about its own axis, and other gearing seat, of a tool fitting over said stem, said intermediate to thepower shaft and cutter head for imparting thereto 'arelatively slow movement of revolution: around the axis of the stem,as set forth. v v

4. The combination with a post or stem adapted for attachment to a valve seat, of a refacing device fitting over said stem, a pressure foot for supporting the refacing device upon the valve seat, a spring intermediate to the presser foot and said device, and means adapted to adjust the device toward the valve seat against the pressure ofsa'id spring and to retract the same therefrom, as set forth.'

5. The comblnationwith a post or stem "adapted for attachmentto a valve seat, of a refacing device fitting oversaid stem and comprising a rotary cutter head mounted in a spindle head adapted to rotate around said stem, spindle head, a presser foot mounted in the spindle head, a' spring inter mediate to said foot and the spindle head and means for adjusting the position of the refacing device vertically on the stem, as set forth. a 1

In testimony whereof I afiiX my signature in the presence of two subscribing witnesses.

" HERMAN CASLER.

Witnesses: p

HARRY HULL,- Mrs. WV. WVfP 'rTERsoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, 1). c. t I a 

